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JP2013145993

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2013145993
Abstract: To provide an electrodynamic speaker capable of reducing the number of steps of
forming a tinsel wire connected to a voice coil and connecting it to a terminal, and a method of
manufacturing the same. SOLUTION: An edge mounting portion for mounting an edge formed on
one side of a base, a magnetic circuit mounting portion for mounting a magnetic circuit formed
on the other side of the base, and an edge mounting portion It has a connection part which
connects a magnetic circuit attachment part and defines a plurality of window parts, and a
terminal fixing part which fixes a terminal, and divides the substantially annular edge attachment
part, and the window part of the connection part The middle portion of the tinsel wire passes
through the window portion communicating with the void, and the other end side of the tinsel
wire is connected and fixed to the terminal. [Selected figure] Figure 2
Electrodynamic speaker and method of manufacturing the same
[0001]
The present invention is a small-sized electrodynamic speaker excellent in sound reproduction
capability, which includes a frame and a magnetic circuit, and can reduce the number of steps of
forming a tinsel wire connected to a voice coil and connecting it to a terminal. Type speaker and
a method of manufacturing the same
[0002]
In audio equipment such as a display to which a speaker for reproducing sound is attached, it is
required to miniaturize a space required to attach the speaker.
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In particular, a small-sized or elongated (rectangular, oval (elliptical, track-shaped))
electrodynamic speaker is a speaker that arranges a tinsel wire (or lead wire) that supplies an
audio signal current to a voice coil. Since the space on the back side of the diaphragm is
narrowed, there is a problem that the tinsel cord contacts the diaphragm or the frame to easily
generate noise. In a small-sized electrodynamic speaker, when it is attempted to provide an edge
or a damper for supporting a vibration system including a speaker diaphragm, there are
disadvantages for various reasons such as contact between tinsel cords and a reduction in size.
Therefore, various speakers have conventionally been proposed to solve these problems.
[0003]
For example, in the case of a speaker used for vehicles, it is a speaker comprising a diaphragm
coupled to a frame on the top surface of a magnetic circuit having a magnetic gap and coupled
around the periphery of this frame to a voice coil fitted in the magnetic gap. Connect the lead
wire drawn from the voice coil and the lead wire on the surface side of the diaphragm, and
connect the connected lead wire and the connector coupled onto the gasket coupled to the
periphery of the frame. In the above speaker, there is a speaker which is a copper foil insertmolded on the diaphragm on which the lead-out wire is injection-molded (Patent Document 1).
[0004]
A speaker comprising: a speaker diaphragm; a speaker edge; a frame; a voice coil; a signal input
terminal; and a tinsel wire connecting the voice coil and the signal input terminal, the speaker
edge being An edge movable portion coupled to the outer periphery of the speaker diaphragm
and / or the voice coil bobbin; and an edge outer peripheral portion continuous from the edge
movable portion and fixed to the frame, the edge outer peripheral portion being the one of the
speaker diaphragm The frame comprises: an edge outer periphery first fixing portion extending
in a direction substantially perpendicular to the vibration direction; and an edge outer periphery
second fixing portion extending in a direction substantially perpendicular to the edge outer
periphery first fixing portion; There is a speaker having a frame first fixing portion coupled to the
edge first fixing portion and a frame second fixing portion coupled to the edge second fixing
portion.
Preferably, an end portion of the tinsel cord on the signal input terminal side is held by the
second outer peripheral edge fixing portion of the speaker edge (Japanese Patent Application
Laid-Open No. 2000-147118). As described in paragraph 0014 of Patent Document 1, according
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to the present invention, the lower end portion of the second outer peripheral edge portion of the
edge holds the end portion on the signal input terminal side of the tinsel wire, whereby the tinsel
wire is a speaker edge Can be prevented, and as a result, the generation of noise can be
prevented.
[0005]
Patent No. 3653815 gazette JP, 2004-32008, A
[0006]
However, in the case of the electrodynamic speaker, when solving the above problems, in order
to maintain the beauty or keep the entire height low, as in Patent Document 1, when the tinsel
cord can not be arranged on the front side of the speaker diaphragm There is.
Further, as in Patent Document 2, by bonding and fixing the edge outer peripheral portion of the
speaker edge at the time of manufacturing the speaker, the second outer peripheral portion of
the edge outer peripheral fixing portion naturally arranges the wiring form of the tinsel wire
located below the speaker edge. As a result, although it is possible to reduce the work of
arranging the wiring form of the tinsel wire in the manufacturing process of the speaker and
improve the manufacturing efficiency, the wiring form of the tinsel wire can not be arranged
beforehand. There is a problem that it may occur. In the case of arranging a tinsel wire on the
back side of a speaker diaphragm in a small electrodynamic speaker, if the tinsel wire can not be
shaped in advance before placing the speaker diaphragm on the frame, the tinsel wire may be
produced due to variations during mass production. There is a problem in that something that
touches the other part is generated and an unusual noise is generated.
[0007]
The present invention has been made to solve the above-described problems of the prior art, and
its object is to provide a small-sized electrodynamic speaker excellent in sound reproduction
capability, including a frame and a magnetic circuit, and a voice coil. It is an object of the present
invention to provide an electrodynamic speaker capable of reducing the number of steps in the
process of forming a tinsel wire to be connected to and connecting it to a terminal, and a method
of manufacturing the same.
[0008]
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An electrodynamic speaker according to the present invention comprises a frame having a
substantially basket-like base, a diaphragm accommodated in the frame, an edge coupled to the
outer peripheral end of the diaphragm, a voice coil coupled to the diaphragm, and a voice coil A
magnetic circuit having a magnetic gap into which the magnetic head is inserted, a tinsel wire
whose one end is connected and fixed to the voice coil, and a terminal connected to the frame,
and the frame has an edge formed on one side of the base An edge attachment portion to be
attached, a magnetic circuit attachment portion to attach a magnetic circuit formed on the other
side of the base, a connection portion connecting the edge attachment portion and the magnetic
circuit attachment portion to define a plurality of windows, and a terminal A terminal fixing
portion to be fixed, which divides the substantially annular edge mounting portion, and includes
at least one space communicating with the window portion of the connecting portion, and the
middle portion of the tinsel wire communicates with the space or the space That windows
through the other end side of the tinsel wire is connected and fixed to the terminal.
[0009]
Preferably, in the electrodynamic speaker according to the present invention, the inner periphery
fixing portion whose edge is connected to the outer periphery end of the diaphragm, the outer
periphery fixing portion fixed to the edge mounting portion of the frame, and the inner periphery
fixing portion and the outer periphery fixing A movable supporting portion for vibratably
connecting to the portion, the outer peripheral fixing portion having a protrusion at a position
corresponding to the gap of the edge mounting portion, the protrusion being accommodated
entirely or partially in the gap, It includes a tinsel wire fixing portion for fixing the middle portion
of the tinsel wire.
[0010]
Preferably, in the electrodynamic speaker of the present invention, the diaphragm and the edge
are integrally formed, and at least the diaphragm and the support movable portion of the edge
are made of different materials.
[0011]
More preferably, in the electrodynamic speaker of the present invention, the diaphragm and the
outer periphery fixing portion of the edge are made of the same material.
[0012]
Further, in the method of manufacturing an electrodynamic speaker according to the present
invention, a frame having a substantially basket-like base, a diaphragm accommodated in the
frame, an edge coupled to the outer peripheral end of the diaphragm, and a voice coupled to the
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diaphragm A manufacturing method of an electrodynamic speaker including a coil, a magnetic
circuit having a magnetic gap in which a voice coil is inserted, a tinsel wire whose one end is
connected and fixed to the voice coil, and a terminal connected to a frame. A plurality of edge
mounting portions for mounting the edge formed on one side of the base, a magnetic circuit
mounting portion for mounting the magnetic circuit formed on the other side of the base, an
edge mounting portion and the magnetic circuit mounting portion A frame having a connecting
portion defining the window portion and a terminal fixing portion fixing the terminal, which
divides the substantially annular edge mounting portion and includes at least one gap
communicating with the window portion of the connecting portion. Forming a vibration system,
forming a vibration system, forming a vibration system, connecting a terminal to a terminal fixing
portion of a frame, connecting a diaphragm, an edge, a voice coil, and a tinsel wire. When moving
from one side to the other side of the base of the frame, pass the middle part of the tinsel cord
through the window communicating with the void of the frame or the opening, and place the
edge on the edge attachment of the frame And connecting and fixing the other end of the tinsel
wire to the terminal, attaching the magnetic circuit to the magnetic circuit attachment of the
frame, and disposing the voice coil in the magnetic gap of the magnetic circuit. .
[0013]
Preferably, in the method of manufacturing an electrodynamic speaker according to the present
invention, an inner peripheral fixing portion connected to the outer peripheral end of the
diaphragm, an outer peripheral fixing portion fixed to the edge mounting portion of the frame,
and an inner peripheral fixing portion and the outer peripheral fixing The movable supporting
portion vibratably connecting to the portion, and the outer peripheral fixing portion includes the
tinsel wire fixing portion for fixing the middle portion of the tinsel wire to the projection at a
position corresponding to the void of the edge mounting portion And a step of mounting and
fixing an edge on the edge mounting portion of the frame such that the protrusion including the
tinsel wire fixing portion is entirely or partially housed in the void, and the middle of the tinsel
wire The method further includes the step of fixing the portion with the tinsel wire fixing portion.
[0014]
Preferably, the method of manufacturing an electrodynamic speaker according to the present
invention includes the step of integrally molding the diaphragm and the edge, and configuring at
least the diaphragm and the supporting movable portion of the edge with different materials.
[0015]
More preferably, the method of manufacturing an electrodynamic speaker according to the
present invention includes the step of forming the diaphragm and the outer peripheral fixing
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portion of the edge with the same material.
[0016]
Hereinafter, the operation of the present invention will be described.
[0017]
An electrodynamic speaker according to the present invention comprises a frame having a
substantially basket-like base, a diaphragm accommodated in the frame, an edge coupled to the
outer peripheral end of the diaphragm, a voice coil coupled to the diaphragm, and a voice coil A
magnetic circuit having a magnetic gap to be inserted, a tinsel wire whose one end is connected
and fixed to a voice coil, and a terminal connected to a frame.
This speaker frame is made of resin or metal, and inside the substantially basket-like base, the
speaker diaphragm, the voice coil transmitting the driving force to this, and the damper that
vibratably supports these speaker vibration systems Configure a speaker that contains and / or
an edge.
[0018]
The frame of the electrodynamic speaker comprises an edge mounting portion for mounting an
edge formed on one side of a base, a magnetic circuit mounting portion for mounting a magnetic
circuit formed on the other side of the base, an edge mounting portion and a magnetic circuit
mounting It has a connecting part which connects a part and defines a plurality of windows, and
a terminal fixing part which fixes a terminal.
The substantially basket-like base defines the window portion by connecting the front side of the
frame constituting the edge mounting portion or mounting portion, the rear side of the frame
constituting the magnetic circuit fixing portion or the damper mounting portion, and these. And
at least one connecting portion.
[0019]
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Further, the frame separates the substantially annular edge attachment portion and includes at
least one space communicating with the window portion of the connection portion.
That is, the edge attachment portion of the frame has a generally annular shape throughout,
including the flat portion that fixes the edge, and is separated by at least one air gap.
This void is defined, for example, by a slit formed from one side to the other side of the base or
from a slit formed from the inner peripheral side to the outer peripheral side of the base and
communicated with the window of the connecting portion.
As a result, in this electrodynamic speaker according to the present invention, an intermediate
portion of the tinsel wire connected with one end connected and connected to the voice coil
constituting the vibration system of the electrodynamic speaker communicates with the air gap
or air gap The other end side of the tinsel cord is connected and fixed to the terminal so as to
pass through the window.
[0020]
In the method of manufacturing an electrodynamic speaker according to the present invention,
as described above, since the frame includes the space for dividing the substantially annular edge
attachment portion, the vibration system including the previously prepared tinsel wire is
processed from one side of the base of the frame to the other. When it is moved toward the side
and placed at a predetermined position, the middle portion of the tinsel wire can be easily passed
through the air gap of the frame or the window communicating with the air gap, as a result, the
manufacture of the electrodynamic speaker Man-hours in the process can be reduced.
In other words, the process that requires time for the tip of the tinsel wire to dive in the window
defined under the edge attachment is simply an easy step of passing the middle portion of the
tinsel wire through the gap of the edge attachment. Since it replaces | exchanges, the man-hour
of the process of shape | molding the tinsel wire connected to a voice coil and connecting to a
terminal can be reduced.
[0021]
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Furthermore, the edge of the electrodynamic speaker can vibrate the inner peripheral fixing
portion connected to the outer peripheral end of the diaphragm, the outer peripheral fixing
portion fixed to the edge mounting portion of the frame, the inner peripheral fixing portion and
the outer peripheral fixing portion A movable movable portion coupled to the outer
circumferential fixed portion has a projection at a position corresponding to the gap of the edge
attachment portion, and the protrusion accommodated in the void entirely or partially includes
the middle portion of the tinsel cord May be included.
When the outer peripheral fixing portion corresponding to the gasket for attaching the edge to
the frame is formed as a protrusion including a tinsel wire fixing portion for fixing the middle
portion of the tinsel wire, the protrusion is entirely or entirely in the gap of the edge attaching
portion By accommodating a part, it is possible to further reduce the number of steps of the
process of forming the tinsel wire connected to the voice coil.
When the edge is placed on and fixed to the edge attaching portion of the frame, the middle
portion of the tinsel wire can be easily passed through the window communicating with the void
of the frame or the void.
[0022]
The diaphragm and the edge may be integrally molded of different resins by a method such as
two-color molding, and at least the diaphragm and the support movable portion of the edge may
be made of different materials.
The diaphragm and the outer periphery fixing portion of the edge may be made of the same
material.
It becomes easy to form the above-mentioned protrusion including the tinsel wire fixing portion
for fixing the middle portion of the tinsel wire, and in the manufacturing process of the smallsized electrodynamic speaker, the tinsel winding is previously made before mounting the speaker
diaphragm on the frame. It has the advantage of shaping the line. When the tinsel cords are
arranged on the back side of the speaker diaphragm, the problem that the tinsel cords come into
contact with other portions due to variations during mass production and causes abnormal noise
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is reduced.
[0023]
The electrodynamic speaker of the present invention is capable of reducing the number of steps
in the process of forming a tinsel wire connected to a voice coil and connecting it to a terminal,
and has excellent voice reproduction capability and a small size suitable for attachment to
devices such as displays. An electrodynamic speaker can be provided.
[0024]
It is a perspective view explaining an electrodynamic speaker 1 of the present invention.
(Example 1) FIG. 7 is an exploded perspective view for explaining a method of manufacturing the
electrodynamic speaker 1 of the present invention. (Example 1) It is a figure explaining the flame
| frame 6 of the electrodynamic speaker 1 of this invention. (EXAMPLE 1) It is a rear perspective
view for explaining a vibration system of another electrodynamic speaker 1a of the present
invention. (Embodiment 2) FIG. 7 is an exploded perspective view illustrating a method of
manufacturing another electrodynamic speaker 1a according to the present invention. (Example
2)
[0025]
Hereinafter, an electrodynamic speaker according to a preferred embodiment of the present
invention and a method of manufacturing the same will be described, but the present invention is
not limited to these embodiments.
[0026]
1 and 2 illustrate an electrodynamic speaker 1 according to a preferred embodiment of the
present invention.
Specifically, FIG. 1 is a perspective view of the electrodynamic speaker 1. Moreover, FIG. 2 is a
developed view explaining the structure of the dynamic-dynamic-type speaker 1, and is the
perspective view except some components unnecessary for description. The electrodynamic
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speaker 1 includes a vibration system including a track-type diaphragm 2 and an edge 3 and a
voice coil 4, a frame 6, and a magnetic circuit 10, and is manufactured using an assembly jig 20.
Also, FIG. 3 is a view for explaining the frame 6 of the electrodynamic type dynamic speaker 1,
FIG. 3 (a) is a plan view, and FIGS. 3 (b) and 3 (c) are side views. is there.
[0027]
The electrodynamic speaker 1 of the present embodiment is a slender electrodynamic speaker
having a track-shaped diaphragm 2. The diaphragm 2 is supported at its outer peripheral end by
the edge 3, and the outer peripheral end of the edge 3 is fixed to the frame 6. Further, the frame
6 has an elongated shape corresponding to the track-shaped diaphragm 2, and the magnetic
circuit 10 fixed so as to be accommodated in the frame 6 also has an elongated shape having a
narrow width in the minor axis direction. . Therefore, the electrodynamic speaker 1 is an
electrodynamic speaker suitable for a device having a small width for attaching the speaker, such
as a side surface of a display unit of a device such as a display. A terminal 8 to which an audio
signal current is supplied is attached to the side of the frame 6, and a part of the magnetic circuit
10 is exposed on the back.
[0028]
The diaphragm 2 of this embodiment is a track-shaped speaker diaphragm having a track-shaped
external dimension of about 12 mm × 36 mm and formed of a polyolefin thermoplastic resin as
a material to a thickness of about 0.2 mm. The outer peripheral end is freely supported by the
edge 3 so as to be able to vibrate. The diaphragm 2 is provided with a plurality of ribs in a
convex portion on the center side, and the voice coil 4 is connected from the back side to a
boundary portion with an outer peripheral end which is a cone shape having a shallow cross
section.
[0029]
The edge 3 has an inner peripheral fixing portion 3a connected to the outer peripheral end of the
diaphragm 2, an outer peripheral fixing portion 3b fixed to an edge attaching portion 61 of the
frame 6 to be described later, an inner peripheral fixing portion 3a and an outer peripheral fixing
portion 3b And a movable support 3c that vibratably connects the two. The outer peripheral
fixing portion 3b may have a thickness and be used as a gasket. Further, the support movable
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portion 3c may be a roll edge having a substantially roll-shaped cross section, or a corrugation
edge having a corrugation. The edge 3 may be formed of a material different in flexibility and
lower in hardness than the inner fixed portion 3a and the outer fixed portion 3b, and the support
movable portion 3c may be a polyolefin thermoplastic resin or other polystyrene thermoplastic
resin And polyester thermoplastic resin, polyurethane thermoplastic resin, and the like. The edge
3 may be formed by connecting with the diaphragm 2 separately manufactured by an adhesive,
or may be integrally formed with the diaphragm 2 by a manufacturing method such as two-color
molding as in this embodiment. Good. When the diaphragm 2 and the outer peripheral fixing
portion 3b of the edge 3 are made of the same material by a manufacturing method such as twocolor molding, since the diaphragm 2 and the edge 3 are integrated in advance, the
electrodynamic speaker 1 In the manufacturing process of the present invention, the number of
operation steps can be reduced.
[0030]
The voice coil 4 is formed in a track shape by winding the coil 4 a around a cylindrical bobbin 4
b. Further, one end side of the tinsel wire 7 is connected and fixed to the coil 4 a of the voice coil
4. Therefore, two tinsel cords 7 are connected to both ends of the coil 4 a in order to supply an
audio signal to the voice coil 4. Further, the other end side of the tinsel cord 7 is connected and
fixed to a terminal 8 fixed to a frame 6 described later.
[0031]
The magnetic circuit 10 is provided with a yoke having a wedge-shaped cross section, and a
magnet and a plate are mounted inside the yoke to form a track-shaped magnetic gap between
the plate and the side wall of the yoke. It is. As a result, since a magnetic field exhibiting a high
magnetic flux density is formed in the magnetic gap, in the electrodynamic speaker 1, the coil 4a
of the voice coil 4 is disposed in the magnetic gap. The magnetic circuit 10 is connected to a
magnetic circuit attachment portion 62 of the frame 6 described later. Each member constituting
the magnetic circuit 10 is fixed by an adhesive. The magnetic circuit 10 is also fixed to the
magnetic circuit attachment portion 62 of the frame 6 with an adhesive. The magnetic circuit 10
is not limited to the configuration of the present embodiment as long as it forms a track-shaped
magnetic gap.
[0032]
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In the manufacturing process of the electrodynamic speaker 1 of this embodiment, as shown in
FIG. 2, the magnetic circuit 10 is placed on a predetermined assembly jig 20, and the frame 6
and the diaphragm are placed thereon. The coil 4a of the voice coil 4 can be arranged in the
magnetic gap of the magnetic circuit 10 by mounting the vibration system including the 2 and
the edge 3 and the voice coil 4 in order. . If the assembly jig 20 is removed after the adhesive is
solidified, the speaker vibration system including the vibration plate 2, the edge 3, the coil 4 and
the tinsel wire 7 is vibratably supported with respect to the frame 6 and the magnetic circuit 10
Be done. The frame 6 may be a metal frame formed by press-forming a steel plate. In the present
embodiment, a case is described in which the damper for supporting the speaker vibration
system in a vibratable manner is not provided, but the electrodynamic speaker 1 may be
separately provided with a damper for vibratably supporting the voice coil 4. .
[0033]
As shown in FIG. 3, the frame 6 is formed of resin and has a substantially basket-like base 60.
The frame 6 comprises an edge mounting portion 61 for mounting the edge 3 formed on one
side of the base 60, a magnetic circuit mounting portion 62 for mounting the magnetic circuit 10
formed on the other side of the base 60, an edge mounting portion 61 and magnetism. It has the
connection part 63 which connects with the circuit attaching part 62, and defines the some
window part 64, and the terminal fixing | fixed part 66 which fixes the two terminals 8. FIG. At
four corners of the edge attachment portion 61 of the base 60, screw holes 67 for attaching the
electrodynamic speaker 1 to another housing or the like are formed. Furthermore, in the frame 6,
two gaps 65 communicating the window portion 64 of the connecting portion 63 with the
substantially annular edge attachment portion 61 corresponding to the window portion 64 in
which the terminal fixing portion 66 is provided are formed. It is done. The air gap 65 of the
frame 6 divides the substantially annular edge attachment portion 61 including the flat portion
for fixing the edge 3 at two places shown in FIG. 3 and communicates with the window portion
64 in which the terminal fixing portion 66 is provided. The air gap 65 may be a slit having a
width equal to or greater than a predetermined dimension through which the tinsel wire 7
passes, and the shape of the slit does not matter. Therefore, the speaker vibration system
including the diaphragm 2, the edge 3, the coil 4 and the damper 5 is vibratably supported with
respect to the frame 6 and the magnetic circuit 10. The frame 6 may be a metal frame formed by
press-forming a steel plate.
[0034]
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In the method of manufacturing the electrodynamic speaker 1 of the present embodiment, the
substantially basket-like base 60 is used to divide the substantially annular edge attachment
portion 61 and to communicate with the window portion 64 of the connecting portion 63. Form
a frame 6 including at least one. Then, the terminal 8 is connected to the terminal fixing portion
65 of the frame 6 by preliminary processing. Further, as shown in FIG. 2, the vibration system
including the diaphragm 2, the edge 3, the voice coil 4 and the tinsel wire 7 is previously
connected in a predetermined shape by preliminary processing. Then, the middle portion of the
tinsel wire 7 of this vibration system is allowed to pass through the window 65 communicating
with the air gap 65 or the air gap 65 of the frame 6, and the edge 3 is mounted on the edge
attachment portion 61 of the frame 6 and fixed. The other end of the wire 7 is connected and
fixed to the terminal 8. Further, the magnetic circuit 10 is attached to the magnetic circuit
attachment portion 62 of the frame 6, and the voice coil 4 is disposed in the magnetic gap (14) of
the magnetic circuit 10.
[0035]
Therefore, in the electrodynamic speaker 1 of the present embodiment, the middle portion of the
tinsel wire 7 connected with one end connected to the voice coil 4 constituting the vibration
system of the electrodynamic speaker has an air gap 65 of the frame 6. And the other end side of
the tinsel cord 7 is connected and fixed to the terminal 8. That is, in the method of manufacturing
the electrodynamic speaker 1, as described above, since the frame 6 includes the air gap 65
which divides the substantially annular edge attachment portion 61, as shown in FIG. The middle
portion of the tinsel wire 7 when the vibration system including is moved from one side (edge
attachment portion 61 side) of the base 60 of the frame 6 to the other side (magnetic circuit
attachment portion 62 side) and mounted at a predetermined position. The portion can be easily
passed through the window 64 communicating with the air gap 65 of the frame 6.
[0036]
As a result, it is possible to reduce the number of operation steps in the process of manufacturing
the dynamic loudspeaker 1. That is, the process requiring time for causing the tip of the tinsel
wire 7 to dive in the window 64 defined on the lower side of the edge attachment portion 61 of
the frame 6 is simply the middle portion of the tinsel wire 7 as the edge attachment portion 61.
Since the process is replaced with the easy process of passing the air gap 65 to be divided, it is
possible to reduce the number of processes of forming the tinsel wire 7 connected to the voice
coil 4 and connecting it to the terminal 8.
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[0037]
In the case where the electrodynamic speaker 1 is a small-sized small-sized speaker, the work of
causing the tip of the tinsel wire 7 to go under the window 64 of the frame 6 takes time, so the
man-hour reduction effect is also increased. . Of course, in the electrodynamic speaker 1 of the
present embodiment, the problem that the tinsel cord 7 contacts the other part of the frame 6 to
cause abnormal noise can also be reduced. The electrodynamic speaker 1 can realize good sound
reproduction by stabilizing the operation of the vibration system including the diaphragm 2 and
the edge 3.
[0038]
FIGS. 4 and 5 illustrate an electrodynamic loudspeaker 1a using another edge 30 according to
another preferred embodiment of the present invention. Specifically, FIG. 4 is a rear perspective
view of the vibration system including the edge 30 of the electrodynamic speaker 1a as viewed
from the back side, and FIG. 5 is an exploded perspective view illustrating the method of
manufacturing the electrodynamic speaker 1a. FIG. This embodiment and the electrodynamic
speaker 1 of the previous embodiment are common except for the configuration of the method of
fixing the edge 30 and the tinsel cord 7 described above. Therefore, the same reference numerals
are given to the same parts as those of the previous embodiment, and the description will be
omitted.
[0039]
The edge 30 of the electrodynamic speaker 1a of this embodiment includes an inner peripheral
fixing portion 3a connected to the outer peripheral end of the diaphragm 2, an outer peripheral
fixing portion 3b fixed to the edge attaching portion 61 of the frame 6, and an inner peripheral
fixing It is common to the edge 3 of the previous embodiment in that it includes the support
movable portion 3 c that vibratably connects the portion 3 a and the outer peripheral fixed
portion 3 b. In the edge 30 of the present embodiment, the outer peripheral fixing portion 3 b
has two protrusions 31 at positions corresponding to the air gaps 65 of the edge attaching
portion 61 of the frame 6. When the electrodynamic speaker 1a is assembled, the projection 31
of the edge 30 forms a tinsel wire fixing portion that is partially accommodated in the air gap 65
of the frame 6 to fix the middle portion of the tinsel wire 7. That is, the outer peripheral fixing
portion 3 b corresponding to a gasket for attaching the edge 30 to the frame 6 is formed as a
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protrusion 31 including a tinsel wire fixing portion for fixing the middle portion of the tinsel wire
7. The tinsel wire fixing portion of the protrusion 31 may have a hole through which the tinsel
wire 7 passes, and may be a portion including a configuration in which the tinsel wire 7 is held
between a plurality of nail-shaped sections. .
[0040]
Therefore, the protrusion 31 including the tinsel wire fixing portion fixes the middle portion of
the tinsel wire 7 by storing the whole or a part of the protrusion 31 in the air gap 65 of the edge
attaching portion 61 of the frame 6 Therefore, in the electrodynamic speaker 1 a of the present
embodiment, the number of steps in the process of forming the tinsel cord 7 connected to the
voice coil 4 can be further reduced. When the edge 30 is placed on and fixed to the edge
attachment portion 61 of the frame 6, the middle portion of the tinsel wire 7 can easily pass
through the window 65 communicating with the air gap 65 or the air gap 65 of the frame 6. This
is because there is no need for the step of forming the tinsel wire 7 again. The electrodynamic
speaker 1 a of this embodiment has an advantage that the tinsel cord 7 can be shaped in advance
before the diaphragm 2 and the edge 30 are placed on the frame 6.
[0041]
As described in the previous embodiment, the diaphragm 2 and the edge 30 may be integrally
formed of different resins by a method such as two-color molding, and at least the support
movable portion 3c of the diaphragm 2 and the edge 30 is And may be made of different
materials. The diaphragm 2 and the outer periphery fixing portion 3b of the edge 30 may be
made of the same material. There is an advantage that it becomes easy to form the abovementioned projection 31 including a tinsel wire fixing portion for fixing the middle portion of the
tinsel wire 7. When the tinsel wire 7 is disposed on the back side of the diaphragm 2 and the
edge 30, it is possible to reduce the problem that the tinsel wire 7 contacts the other part and
causes abnormal noise due to variations in mass production, It becomes possible to realize a
stable dynamic electrodynamic speaker 1 with less operation failure.
[0042]
Of course, in the frame 6 used for the electrodynamic speakers 1 and 1a, the air gaps 65 of the
edge attachment portion 61 may be respectively provided corresponding to a plurality of tinsel
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wires, and a plurality of adjacent tinsel wires 7 At least one or more may be provided so as to
pass collectively. Further, if a portion for forming the tinsel wire 7 is provided in the assembly jig
20, the speaker vibration system including the speaker diaphragm 2 and the edge 3b, the voice
coil 4 and the tinsel wire 7 is fixed to the frame 6 Since positioning with respect to the circuit 10
can be performed with high accuracy, electrodynamic speakers 1 and 1a with stable operation
can be realized.
[0043]
The dynamic speakers 1 and 1a of the above-described embodiment are track-shaped speakers
whose short diameter direction is shorter than the long diameter direction, but they are provided
with a cone-shaped diaphragm having a circular outer diameter. The present invention is also
applicable to a speaker using a substantially circular frame corresponding to the speaker
diaphragm. When there is a limitation in the shape and size of the substantially circular frame in
a small speaker, positioning of the tinsel wire with respect to the frame becomes easy, so there is
less malfunction due to contact with other parts of the tinsel wire 7 to generate noise. It is
possible to realize a stable speaker in operation.
[0044]
The electrodynamic speaker of the present invention and the method of manufacturing the same
can be applied not only to small speakers but also to headphones.
[0045]
DESCRIPTION OF SYMBOLS 1, 1a Speaker 2 diaphragm 3, 30 edge 4 voice coil 6 frame 7 tinsel
wire 8 terminal 10 magnetic circuit 20 assembly jig
12-05-2019
16
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